At the age of 2, a child will typically have a vocabulary of ______ words and be able to say sentences ______ words in length
50–100; 2–3
5,000–10,000; 10–12
100–200; 5–20
100–2,000; 2–6
100–2,000; 2–6
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Which of the following statements about sex differences in adolescents' reactions to pubertal changes is true?
A) While most boys get some information from their mothers, almost all girls get their information from reading material or websites. B) Overall, boys get much less social support than girls for the physical changes of puberty. C) A few girls tell a friend that they are menstruating, but more boys tell a friend about spermarche. D) Girls, but not boys, are likely to benefit from opportunities to ask questions and discuss feelings with a sympathetic parent or health professional.
Which of the following statements about familial Alzheimer's disease is true?
A) It has no obvious family history. B) It progresses more slowly than the sporadic type. C) About half of people affected have an abnormal gene on chromosome 19. D) It generally has an early onset, between ages 30 and 60.